Washington: President Donald Trump is taking Chinese President Xi Jinping to visit the National Archives on Friday, showing off the sacred texts of U.S. democracy to the leader of the world’s most powerful communist country to cap off a three-day state visit criticized for being heavy on pomp and light on substance . Xi is expected to depart Washington after touring the nation's vault of records, where the Declaration of Independence , the Constitution and the Bill of Rights are held. The two leaders have made a show of working to preserve harmony between the world's two largest economies, though…